The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

A war memorial that appears to ascend from its forested setting.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The site of the first "historically true" UFO encounter in the U.S.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

A small burial ground honoring Native American veterans of the Revolutionary War.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This historic cemetery is filled with markers that look more like candy than was likely intended.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

The skeletal white beams stand as a monument to religious dissent.